By combining cells that have expected frequencies smaller than 5, we guard against having an inflated test statistic that could have led us to incorrectly accept the null hypothesis.

Question

Quizplus · Accepted Answer

Combining cells with expected frequencies smaller than 5 is done to ensure the validity of the chi-square test assumptions, specifically to avoid an inflated Type I error rate that could lead to incorrectly rejecting the null hypothesis, not accepting it.

By Combining Cells That Have Expected Frequencies Smaller Than 5